George clay



Krem

AM. PHOTO-LITRO. C0. NY (OSBURNES PROCESS) aELNITED STATES PATENTOFFICE.

GEORGE CLAY, OF NEIN' YORK, N. Y.

LOCK.

Specification of Letters Patent No. 23,662, dated .April 19, 1859.

To all whom it may concern:

Be it known that I, GEORGE CLAY, of the city, county, and State of NewYork, have invented a new and useful Improvement in Locks; and I dohereby declare that the following is a full, clear, and eXactdescription of the same, reference being had to the annexed drawings,making a part of this speci lic-ation, in which- Figure l, is a verticalsection of my invention, taken in the line a, e, Fig. 3. Fig. 2, is atransverse section of do., taken in the line Fig. l. Fig. 3, is ahorizontal section of do., taken in the line y, y, Fig. l.

Similar letters of reference indicate corresponding parts in the severalfigures.

The nature of my invention consists in the within specied peculiarconstruction and arrangement of the following parts for united operationin a lock, whereby a simpler, cheaper and more convenient and effectivesafety lock is produced, to wit, the lock case with right and leftdouble walls, the inner walls being furnished with longitudinal rightand left slots; the right and left key hole, sliding guard platesfurnished with right and left key holes and with right andV leftvertical bars which are forked so as to straddle the key and arranged onopposite sides of the bolt so as to be operated upon separately by thekey bit, and are supported and guided by horizontal transverse pinswhich pass through the longitudinal slots in the inner walls of the caseand fasten in the key hole guard plates, the upper ends of said forkedbars terminating in hinged auxiliary tumblerswhich rest on the upperpart of the bolt and behind a stop formed on the same, and above thetuinblers of the bolt and coining into action so as to assist, when thebolt is shot out and the guard plates close the key hole, in holding thebolt from being moved by other means than the key, and move out ofaction when the bolt is shot in or back and the key hole uncovered.

To enable those skilled in the art to fully understand and construct myinvention, I will proceed to describe it.

A, A, represent the front and back sides of the lock, which are eachformed of two plates a, a, a suitable space being left between them. Thefront and back sides of the lock are secured a proper distance apart bytransverse rods or bars c. B, is the bolt,

placed in the case, as usual, the lower edge of the bolt having a recessmade in it to receive the bit of the key, so that the bolt may beoperated by the turning of the key. These parts are constructed andarranged as usual and therefore do not require a minute description. Ineach space a plate (Z, is placed. These plates have each a hole c1, madein them, corresponding to the key holes f, f, in the front and backsides, A, A, of the lock case. The plates eZ, are allowed to slidefreely in the spaces b, and each plate (l, is attached by bolts s, tovert-ical bars e, e, which are at the inner sides of the inner plates a,a, two bars e, e, being attached to each vplate d, and said bars beingallowed a chance to slide with the guard plates (Z, d, by means oflongitudinal slots t, t, as shown. The upper ends of each pair of barse, e, are connected and a bar or guard f', is attached thereto, one toeach. These pawls or bars rest or bear on the upper edges of the bolt B,as shown clearly in Figs. 1 and 3.

C, is the key of the lock, made of the usual form, and, when inserted inthe lock, has the outer end of its bit g, fitted between the bars e, e,that are directly in front of it.

The bolt B, has a tumbler guard D, at each side of it. These guards areattached by pivots to each side of the case, and serve as a check to themovement of the bolt. They may be constructed and arranged so as to beoperated upon by the key, as usual, and therefore do not require aminute description. Each guard tumbler has a spring 71., bearing uponits upper surface.

The operation is as follows. In order to throw out the bolt, or lock thelock, the key is inserted in the lock and turned from left to right, asindicated by the arrow in Fig. l. The bit g, actuates the bolt B, and atthe same time the outer end of the bit g, acts against the right handbar e, and moves the plate (l, that is connected to them, across theouter keyhole f, thus preventing the insertion of any instrument in saidhole, while the pawl or bar f, that is connected to the upper ends ofthe bars e, that were actuated, serve as a check and auxiliary guard tothe tumblers, D, D. These bars f, being above the bolt B, cannot bereached by a pick nor be operated upon in any way except by a properkey. The outer ends of the bars f1, it will be seen, t behind a ledge orprojection ax, on the upper edge or surface of the bolt, as shownclearly in Fig. l. Vhen the look is unlocked or the bolt thrown back,the key hole e, in the plate cl, Will he thrown in line With the keyholes f, f.

It will be seen that it is perfectly immaterial in which side of thelook the key is nserted, as there is a plate CZ, at each side of thelook, and both sides are arranged precisely similar. It is essentialthat a plate ci, he placed at each side of the lock, as locks arefrequently turned or reversed in order to suit the doors to which theyare applied, a right hand lock being frequently inverted and placed on aleft hand door, and lvice versa.

This invention is extremely simple and GEORGE CLAY.

Titnesses WM. TUSCH, XV. HAUFF.

